The carbon isotopic distribution of Murchison amino acids

  title={The carbon isotopic distribution of Murchison amino acids},
  author={Sandra Pizzarello and Yongsong Huang and Megan Fuller},
  journal={Geochimica et Cosmochimica Acta},
Abstract The δ 13 C values of thirty-four individual amino acids and two pyridine carboxylic acids have been obtained fromthe Murchison meteorite. They were found to range from +4.9 to +52.8‰, with statistically significant differences observed both within and between amino acid subgroups. The 13 C content of α-amino acids declines with increasing chain length, a trend similar to the ones previously observed for carboxylic acids and alkanes. Also 2-methyl-2-amino acids were found to be heavier… Expand
The deuterium enrichment of individual amino acids in carbonaceous meteorites: A case for the presolar distribution of biomolecule precursors
The δD values of over 40 amino acids and two pyridine carboxylic acids of the Murchison and Murray meteorites have been obtained by compound-specific isotopic analyses. For compounds with no knownExpand
Nitrogen-containing compounds in two CR2 meteorites: 15N composition, molecular distribution and precursor molecules
Abstract Amino acids, amines and aldehydes were obtained from the water extracts of two CR2 carbonaceous chondrites from Antarctica and analyzed for their molecular and 15 N isotopic content. TheseExpand
Distribution and stable isotopic composition of amino acids from fungal peptaibiotics: assessing the potential for meteoritic contamination.
It is shown that the relatively simple distribution of the C(4) and C(5) amino acids in fungal peptides is distinct from the complex distribution observed in many carbonaceous chondrites, and potentially diagnostic relationships between the stable isotopic compositions of pairs of amino acids from the fungan peptides that may aid in ruling out fungal contamination as a source of meteoritic amino acids. Expand
Molecular distribution , 13 C-isotope , and enantiomeric compositions of carbonaceous chondrite monocarboxylic acids Jos
The water-soluble organic compounds in carbonaceous chondrite meteorites constitute a record of the synthetic reactions occurring at the birth of the solar system and those taking place during parentExpand
Meteoritic amino acids as chemical tracers of parent-body chemistries
The analysis of the organic matter of meteorites made it possible to identify over 70 amino acids (AA), including 8 of those found in living organisms. However, their relative abundances varyExpand
Assessing the origins of aliphatic amines in the Murchison meteorite from their compound-specific carbon isotopic ratios and enantiomeric composition
The study of meteoritic organic compounds provides a unique window into the chemical inventory of the early Solar System and prebiotic chemistry that may have been important for the origin of life onExpand
Molecular Distribution, 13C-Isotope, and Enantiomeric Compositions of Carbonaceous Chondrite Monocarboxylic Acids.
A novel methodology for the simultaneous analysis of the molecular distribution, compound-specific δ13C and enantiomeric compositions of aliphatic monocarboxylic acids (MCA) extracted from the hot-water extracts of sixteen carbonaceous chondrites from CM, CR, CO, CV and CK groups is developed. Expand
Compound-Specific Carbon Isotope Compositions of Aldehydes and Ketones in the Murchison Meteorite.
Comparisons between δ13C compositions of meteoritic aldehydes and ketones and other organic compound classes were used to evaluate potential structural relationships and associated reactions, including Strecker synthesis and alteration-driven chemical pathways. Expand
Unusual Nonterrestrial L-proteinogenic Amino Acid excesses in the Tagish Lake Meteorite
The distribution and isotopic and enantiomeric compositions of amino acids found in three distinct fragments of the Tagish Lake C2-type carbonaceous chondrite were investigated via liquidExpand
Enrichment of Non-Terrestrial L-Proteinogenic Amino Acids by Aqueous Alteration on the Tagish Lake Meteorite Parent Body
The distribution and isotopic and enantiomeric compositions of amino acids found in three distinct fragments of the Tagish Lake C2-type carbonaceous chondrite were investigated via liquidExpand


Amino acids of the Murchison meteorite. III. Seven carbon acyclic primary alpha-amino alkanoic acids.
Fifty-five amino acids have now been positively identified in the Murchison meteorite, 36 of which are unknown in terrestrial materials, and this unique suite of amino acids is characterized by the occurrence of all structural isomers within the two major classes of amino acid represented. Expand
Isotopic analyses of amino acids from the Murchison meteorite.
The results indicate that the Murchison amino acids are truly isotopically unusual, that the isotopic excesses reside in at least several different amino acids, and thatThe isotopic contents of some of these amino acids reach values of about +40% (delta 13C) and +2500% ( delta D). Expand
Unusual stable isotope ratios in amino acid and carboxylic acid extracts from the Murchison meteorite
The isotopic composition of hydrogen, nitrogen and carbon in amino acid and monocarboxylic acid extracts from the Murchison meteorite confirms the extraterrestrial origin of both classes of compound, and provides the first evidence suggesting a direct relationship between the massive organo-synthesis occurring in interstellar clouds and the presence of pre-biotic compounds in primitive planetary bodies. Expand
Carbon isotope composition of low molecular weight hydrocarbons and monocarboxylic acids from Murchison meteorite
The results suggest the possibility that the production mechanisms for hydrocarbons and carboxylic acids may be similar and impose constraints on the identity of the reactant species, and are consistent with the kinetically controlled synthesis of higher homologues from lower ones. Expand
Amino acids in meteorites.
  • J. Cronin, S. Pizzarello
  • Chemistry, Medicine
  • Advances in space research : the official journal of the Committee on Space Research
  • 1983
The Murchison meteorite has recently been the major source of new naturally-occurring amino acids, and thirty three of these amino acids are unknown in natural materials other than carbonaceous chondrites. Expand
Enantiomeric Excesses in Meteoritic Amino Acids
Gas chromatographic-mass spectral analyses of the four stereoisomers of 2-amino-2,3-dimethylpentanoic acid obtained from the Murchison meteorite show that the L enantiomer occurs in excess, indicative of an asymmetric influence on organic chemical evolution before the origin of life. Expand
α-Hydroxycarboxylic acids in the Murchison meteorite
A VARIETY of indigenous organic compounds have been detected in carbonaceous meteorites1–6, and of these, the amino acids have been the most extensively studied1,7–11. In addition to the amino acidsExpand
Molecular and chiral analyses of some protein amino acid derivatives in the Murchison and Murray meteorites
— The varied organic suite extracted from the Murchison meteorite contains several amino acids that are common to the biosphere. Some of these have been found to be non-racemic, but the indigenousExpand
Molecular and isotopic analyses of Tagish Lake alkyl dicarboxylic acids
The Tagish Lake meteorite soluble organic suite has a general composition that differs from those of both CI- and CM chondrites. These differences suggest that distinct processes may have beenExpand
Carbon Isotopic Composition of Individual, Low Molecular Weight Hydrocarbons and Monocarboxylic Acids from Murchison Meteorite
MOLECULAR WEIGHT HYDROCARBONS AND MONOCARBOXYLIC ACIDS FROM MURCHISON METEORITE. G. Yuen, Chemistry Department, Arizona State University, Tempe, AZ 85287; N. Blair, D. Des Marais, S. Chang, NASA AmesExpand